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The hose end that fits that and is used with the aux fuel kit is part # MS24587-5.
Take your elbow to a hydraulic hose shop or industrial type supply house. It's an AN fitting(-5). JIC fittings will be compatible. (It should be 1/2"-20 thread and 37 degree)
And that's not the TM you needed...
If you look at the tech manual, you should find the part number. You can them google that and find info(usually).
Without a picture or part number, I am not sure what fitting your referencing.
I would guess it's a standard "AN" fitting.